Targeted micronutrient nanofertilizers of injectable actions based on Cu/B/I halloysite nanotube composites

IF 4.8 3区材料科学 Q1 CHEMISTRY, APPLIED

Microporous and Mesoporous Materials Pub Date : 2025-04-29 DOI:10.1016/j.micromeso.2025.113663

Evan Dasi , Ivan Khitrin , Alexey Ruban , Prokopiy Maximov , Natalia Maximova , Peng Yuan , Maxim Rudmin

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引用次数: 0

Abstract

The development of modern fertilizers includes the creation of various eco-friendly composites made from mineral or organic substance carrier combined with nutrient fillers. This study aims to design targeted micronutrient nanofertilizers with injectable properties by chemically activating halloysite nanotubes as carrier. The goal is to analyze the sorption of copper (Cu), boron (B), and iodine (I) on the meso- and micropores of halloysite to enhance their performance. Halloysite nanotubes were modified via intercalation and adsorption of aqueous solutions containing chelated copper, boric acid, or iodine solutions. As a result, nanotube composites with different concentrations were produced. The encapsulation of Cu/B/I in halloysite, as well as the modification of the nanotubes, was investigated using various techniques, including SEM with EDS, BET surface area analysis, TEM with SAED, TG-DSC with MS, and ICP-MS. Laboratory plant growth tests were conducted, along with detailed observations of how the composites affected the leaf surface, to analyze the effectiveness of the designed fertilizers. Copper, boron, and iodine were intercalated in the micropore space of the halloysite. As the concentration of the reacted solution increased, the average outer diameter of the nanotubes increased up to 300 nm, indicating that the macropore space, also known as the “site,” was filled. The results of the plant growth tests revealed a strong adhesion of activated halloysite nanotubes to arugula microgreens and a stimulating effect of the created composites on height and yield, which increased by up to 34 %. This phenomenon guarantees that the fertilizer remains on the plant's surface for an extended period and is less likely to wash away due to irrigation or rain. Surface spraying of halloysite nanotubes allows for the accurate delivery of micronutrients to plants while preventing soil and groundwater contamination, making this fertilizer ecologically sound. The proposed method of activating halloysite with Cu, B, and I solutions is promising and could lead to the development of fertilizers in the near future.

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基于Cu/B/I高岭土纳米管复合材料的可注射靶向微量营养素纳米肥料

现代肥料的发展包括将矿物或有机物质载体与营养物填料结合而成的各种生态友好型复合材料的创造。本研究旨在通过化学活化高岭土纳米管作为载体，设计具有可注射特性的靶向微量营养素纳米肥料。目的是分析铜（Cu），硼(B)和碘(I)在高岭土介孔和微孔上的吸附，以提高其性能。通过插入和吸附含有螯合铜、硼酸或碘溶液的水溶液来修饰高岭土纳米管。制备了不同浓度的纳米管复合材料。采用EDS扫描电镜（SEM）、BET表面积分析、SAED透射电镜（TEM）、MS TG-DSC和ICP-MS等技术研究了Cu/B/I在高岭土中的包封以及纳米管的修饰。进行了实验室植物生长测试，并详细观察了复合材料如何影响叶片表面，以分析所设计的肥料的有效性。铜、硼和碘嵌入到高岭土的微孔空间中。随着反应溶液浓度的增加，纳米管的平均外径增加到300 nm，表明大孔空间（也称为“位点”）被填满。植物生长试验结果表明，活化的高岭土纳米管与芝麻菜微绿具有很强的粘附性，并且复合材料对芝麻菜微绿的高度和产量有刺激作用，最高可提高34%。这种现象保证了肥料能长时间留在植物表面，不太可能被灌溉或雨水冲走。高岭土纳米管的表面喷洒允许将微量营养素准确地输送到植物中，同时防止土壤和地下水污染，使这种肥料在生态上是合理的。提出的用Cu、B和I溶液活化高岭土的方法是有前途的，并可能在不久的将来导致肥料的发展。

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来源期刊

Microporous and Mesoporous Materials 化学-材料科学：综合

CiteScore

10.70

自引率

5.80%

发文量

649

审稿时长

26 days

期刊介绍： Microporous and Mesoporous Materials covers novel and significant aspects of porous solids classified as either microporous (pore size up to 2 nm) or mesoporous (pore size 2 to 50 nm). The porosity should have a specific impact on the material properties or application. Typical examples are zeolites and zeolite-like materials, pillared materials, clathrasils and clathrates, carbon molecular sieves, ordered mesoporous materials, organic/inorganic porous hybrid materials, or porous metal oxides. Both natural and synthetic porous materials are within the scope of the journal. Topics which are particularly of interest include: All aspects of natural microporous and mesoporous solids The synthesis of crystalline or amorphous porous materials The physico-chemical characterization of microporous and mesoporous solids, especially spectroscopic and microscopic The modification of microporous and mesoporous solids, for example by ion exchange or solid-state reactions All topics related to diffusion of mobile species in the pores of microporous and mesoporous materials Adsorption (and other separation techniques) using microporous or mesoporous adsorbents Catalysis by microporous and mesoporous materials Host/guest interactions Theoretical chemistry and modelling of host/guest interactions All topics related to the application of microporous and mesoporous materials in industrial catalysis, separation technology, environmental protection, electrochemistry, membranes, sensors, optical devices, etc.